Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba80fdf08fe5d992057c025cc9f9b0caffc849f5b319d0303cfd39873d614809' 
  AND token = 'v/aD0dRs2Eosrb9E0rpUAW4mY3HwwqLjnfSEKQBVyfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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