SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c160e9b56ea834b3adddee24ada71912329c0c337469dfc7f3af80ce6d5818e' 
  AND token = 'WwvjCxBdFKmoXL8pmPh3s4K7ORJfjT9unx42s9M6zko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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