Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4952d2e75614a60d2832422f55af30f7bb8ced81efb2859b45f1fe39fe1dd07' 
  AND token = 'noq7BNczCh7PW3dlu7tvUucA4oTBvD6av2+mYkpak4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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