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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'cd6506264635f489abc931ca2d82291f0fcfca788750d77a3378dbb7a8826b75' 
  AND token = '0y00HPlO4UaOay7dNLMomxovflN+4sEBD/iqMstJHY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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