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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '28ac25f5519d3b4ee65f0e76f1210c0fc76bd8929f473981fac8ef2012d22936' 
  AND token = 'Hb1o5KDT3gaAhVWu8ly5sifRV8vqWERqiVPpM8pfHxY=' 
  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"
    }
  }
}