Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '88c8e97be6b9097ab449c30740b347b11948ab74173b9676623676264924e3c8' 
  AND token = 'uzTc9vdmjkbQusd25DDTEVsKLeU1uIfc7bwIz2fwcdI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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