SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1f919ee5513ca5cdbc639aa7b215e1c65d5b4298231df70648b782795f08c315' 
  AND token = 'evNIC9V1VS4gmEET/KmYC+UoCEZsAzOVXM2Mo2DhdUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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