Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a1d07d90d6e5af3d321809f83e6dbd842f8511c18b049cc620f8dc6f37afffd' 
  AND token = '9dDuS4R4Eay5fXSTe/wWLYY/KVWyzj1+Oy8wAWsHtDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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