Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5acf51f39ed4c14a76878f7d89bacd8fa939d897044526a3b99a984ed391066' 
  AND token = 'cVW/uP97ZYPq+AQwjyIRw+CKe7ulyOHTkZn+90tiTXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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