Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bad91c716d75b0ead366644f1de35807a479f160d88d6b3de9cac5d9dd3e438' 
  AND token = 'bEfqIq55NM/yeo+hClkffGF/jZFzzJarJkf9s3ikE5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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