SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '722c3986d509b69a6b55ecacfbae7a9cd5274d11889212863cf14b1605043ae8' 
  AND token = 'YJmhhT+2ko9TMDYWqld/FeZKl7P+fLmV4yvIORFOOlY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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