Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70dc35db4d520995fb7ac9b5cac6a2bf234f8924bdb1479ce0ef3734d5bc537f' 
  AND token = 'byhHkjiaLm3udyPc/RBpKQV//vhgtysle2BQy4HOgh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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