Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3062e31176f2fd2a86b0bc5f84866637a8a1d4800d297d9ce592c1206ed41a9' 
  AND token = 'Rk+C9X1ZU2oPi0ozP0B656BnNelrI6WyeGJozkk04v8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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