Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c030ea74d329a492ff1b9729bb2ebbe2ef0d6c092657299bd76ff5ad476fc10e' 
  AND token = 'GmizhsCSxuc+7zSHxwArHA1znrjrquC2tJJD/FOUe5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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