SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3074a2424a60763dadbaf636f3672237e0fd2be470d856ba62127e99c1a94501' 
  AND token = 'Drezj16UCLTagBAc9PllnbOvB3xqnAuPv0L6Gh+Zi78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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