SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '070dbbb40253fe1661fd9c3ae90370d87e043d8bf04882dfb2b989fdc7ff9d96' 
  AND token = 'XUYl67MrpwkzXUoIxRmvxlBjLsK/uNO1tCRfyKmv9wk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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