Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fd7818babba82ff711d73e178ad238dc3fd3ffbd143bd8d32d4e01ed13d3897' 
  AND token = 'gqq/+yeClvF7z5SzXNX2h6cm4cyfUNE5BP5YSqKTs6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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