Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b8768108e89a883fc09c98336b6839a66219578dff9b4f885a8899fe00937ac' 
  AND token = 'ji1yKp7BI5EYX96d7zltHBe4oVP18qhS/6XPrhQZVo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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