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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '20eabbd9a58b0e363c0de26d7d3a440faf2e9d7b1e09c2dea0e3004a92b9376e' 
  AND token = 'ogA4WqhYqAz2zxf9RNQEjhM/C5u04zuDY2/LTEcQn4E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}