Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '527b707075f9cff6530c65c1cb8f3d1c29b6f5bb01cf610b7da5b54c9636775e' 
  AND token = 'Owdl0z1NuQ8svmhD8QBLEv57g4eJ3wDOCfDr8z6ZM/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}