Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e565bc344e31bf58561701b80d134345b6baebe0d1a9e1c99f8d9c399c8af94' 
  AND token = 'E/3vLbqHg1oNpRCeye00gkn4/IZMulbIS8tThi0ROKE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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