Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a431c34f13ad29c4ffafe0ab01ac0692d80e3a800a1f9c6e07f35e8153b12c0' 
  AND token = 'tuBH6ESdk7lMW+UJf879amZjpQ0fKZs3TZgkK3/uAts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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