Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da1d592a0efac527cc25c98e056dca63b335da7ef2e0d871999407f8d0114cf9' 
  AND token = '5FKdFykd8GZhJZgO4563RfB95rQm1QzM7e5hosFp4AY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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