Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36e81e96d5749f6f0967a3eb5de40c2e45079878a706ec7ea38bc4094c820998' 
  AND token = 'IlE67AL1+diusi0Fr6lAFby33YJfz1cn0bIWND14QME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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