Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bec1cb44453ed3c682393d5479cb7f7daeb4e76abee45dadaeb599b36f715f7a' 
  AND token = 'cSaQXSTxPYE9Gg5A4rYfXDXvjC8GBoQcJPEPjQcqzG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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