Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d46c1a162280416d63362450c798fb1abbb6f11cc5dc22176c65f956adaea78' 
  AND token = 'm7R8IV1j07Saoj+QTtj90E9IAe+pl259MrSGQWObIlc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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