Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cd4de0eb9d160f18c1026f74673505392464be74b1875d80262ef3c8c5dcdde' 
  AND token = 'Sphn483cJIERwNzRdYQENeM7lFIce8tzJwktJBP+RPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00065

JSON explain

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