Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ac22405fedabd7c5edcfe48691d0ee3f3ef201a8f9dd91513083ff2b6db3a45' 
  AND token = 'pwN5KwFVMwZVvu0wR8CkIapMa+rG+Bg+pSrkIfyqJEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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