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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4c3d7ef379d15e7485f95ef1fb7be24665f1ea40ff5b6631786aa1da8181689' 
  AND token = 'C94VE6Zb5IJGG0sl9HijOmDwSkVRvULq9/Q/yo37e4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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