SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '770e384dbbd9177ecf1c1f223c4b0f4560cb86c7c2914e1b632da2a2d33e6f7a' 
  AND token = 'nChns/4xd8vzn0HXLiKGhTSeDSFkBAFhKlbXtAJ+o3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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