Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75bc4bbbecfc25581d8c82a0c67bd6b083d2f841ba02eb6b3244f91b22ef66cc' 
  AND token = 'qogiT9srQ5CPAyi2aqR44NYOWsq5RQDpVCt+gnMDJac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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