Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce70e74466fede4c26479f4074a72b825939ada6aa8e0ce979e0047489175d9f' 
  AND token = 'TLsCaZfAxKruNNkPzTYV0+uzMvRySHTW2co4ZkvheAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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