Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0779bc20f36c5f36156f3e77d121c4221b4a818e3121e9be6d1fc3de7c7065b' 
  AND token = 'B4AMmJtORhnMPtsBswQG9Nn1lDakR9PTz0M96xu82fs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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