Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd81186d7a1d1188b48ed17be8798114aa92796d9cff4738c99353dae323dc0a6' 
  AND token = 'dde3NMi1FMMJPRFbmYxNy8NoqYn4SQEtUZq42vo/hpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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