Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d9dd7bce258bb9e8f2b3b2cdb81a59e46e18da3159b7101740d069c2a20f445' 
  AND token = 'RoCdKGPcwAXRaZ2oa6s7XOBGPbFZJp9TqHTACeoXo7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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