Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45b61751653125338edb8c2374e3614bbede26852365e972d9c39f3c375308b3' 
  AND token = 'IBE8Hp6a2gXf32VapIsOJeOaAfTG+ZHPb6pNGAuoFzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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