Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6a365d61006506029f698caa043a45159b40470bfbeb57a6ac0caf631a9e088' 
  AND token = 'BxLdvUSpyE0HM6MstnWugwUTYDbn52eZXhA0NCu3X6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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