Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6061886dd63f0ef16a60395b99ec4c6e3adfe0cc59784f735c8e2385ee045ab2' 
  AND token = '+a4YZT+x73OhiaDEKAsniQwjV+DPouk1H7TzCM6Qlb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}