SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd6ab9d6250d03f538aba68432702b152d9ad2d88190c01e5d4439fd8107d5723' 
  AND token = 'pI+d9JTl++Hh3W7QX3VS4KZKUPWy5loP56C5WwCXvbU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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