Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64cc411b2893ec5c8aaff6192cb11b6e5de3935eb6490f04b4b7e2049a643dc0' 
  AND token = '+ML823sz0kst05oLiyXqn7o3qjNlC70AISKdnm07Jh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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