Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a042c7ac512729fca9e9ebb26d8fe965391679578d93a73fdf673396b2bc4589' 
  AND token = '/Ti73hNYdjs1q5fETy1b+9rZEw8aBDFoSAh07FtZj60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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