Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31c5bd27b03871601a6df898fd01bd2d46aca89d3eef1bf976def30f6b4d0fe0' 
  AND token = '9Vp4C0NYW1QvFA4Ozje4UJJzl6AciHV1UYOtE09ii40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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