Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd20c96224a0987d1b82819693d0f1309c7418792dd38e8e29b8a97fd1fe8ba2d' 
  AND token = '9XjPo1XVadvuzViL48CYizgI8QbkcyJIIjZteYfqwt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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