Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2761b39720362c3f0478459754f897b34037c25a7ae2b183e9c7d7bf93c5eb1' 
  AND token = 'Vs2lBxhhblEjSdUNXtOSi8J9P8CSQsQhcpfzQZEzSx8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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