Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'feea9583d5e602fb3f69cca50ebcb33e09098d616d71fe5d55eabb6dade41efd' 
  AND token = 'ygEgmTKK1OUAHpz9NZ7A0XcrqCVgaQEdwH/sKS+1zJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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