Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d9cfb050628da94ec98bacff165c6ae610f5ef0e87178ec17a81594d21fc242' 
  AND token = 'BgNKyBNGYnffUC8L1j17vz6SEat4kg7MuNMp9nyaUqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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