Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd90b716cd31307a373f1b6bb415bd1bdd1a41104be52654e284a75c4badd10ae' 
  AND token = 'eSsG/FWuQNxMzD780JlHZd4XU4y6VIdFMM1Rxb+WIOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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