Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9eafb0fb2341a12fdfc15f938b8b186b9956b2467f65ac004c2c412a2d2ea39a' 
  AND token = 'VstlX0+XJH9Wqudy1Tiqu19yaY2IAr0D7drGDAPJnww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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