Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4395ffab2d0754ea61b5a02090ec41f60148897d4fd0e0d70e8a004ed7182f47' 
  AND token = 'GAMOI/W0yheIN9PD7mFD4wuRPLOLj2ds4DDUVrC4Xgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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