Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8665ba835e8105eee781266af199677488f250279c7eebd53894e590255cdf97' 
  AND token = 'TVgavgj3JAZS9iMeddj9GxVF/RJ3icXZrsRqLrAmQus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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