SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0325b659067aaf37992c2bf0f0be79de49ff207a50e7954c8d17e93ab67251f' 
  AND token = 'kgDnP5DuzT7lLZOEsYx8wrY6G9BLPpOuelm4jF/Jlc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00108

JSON explain

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