Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e599fc3f2ce8d46be1d31691190a936218c3c7f3fcfe134a74e82833f4a41dcb' 
  AND token = 'Sgtoaip695LXvI2EhHb3sh5JVOwVvZaBGvqIcuC67TA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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