Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0f7850035b64fcebcd5e401ba16d8acd092992a79ec6c713d2223eb8da2c657' 
  AND token = 'ukpBvAnth5fnbk40a5XKe/dTkU4hpbVq8T6ANKO1dZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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