Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51ed0f151d6bea14fdad6fbc0a4085a8b56c7cce11a4aee2c623edb2e3f395b6' 
  AND token = 'xsAUpUY7TLULt4TrmxfvIpVlu8wW+M3bmtzom3aHyT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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