SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '107a12d3ae4a79397ae0f082f8d8bb4605ec57336e938fca652dea885841b97d' 
  AND token = 'BFf1ppVVQLyzDjwhSPBCCDkuVMm7BvPHbr2vtVlpns4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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