Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4c40ee27eba27ac1e730dea5e977e49b0b353b9a86b53198a543bd2bb39bf6b' 
  AND token = 'rh2FQCjZwWEObeDqg2LGKIeLx+TajjDNpw7hm3dNuis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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