SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9745f854c6945e4c13c08227978c287a0510a97a616e3b104fa55a91b677ac8b' 
  AND token = 'KwNHOHJwYIcIX1kPjxPhYYN3+zFGSn6oOnxyQOcJsQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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