Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '833cda222a3370a61f53104505e8e0316646dc33cbd70e27339fba2ce670481f' 
  AND token = 'BUD+2TinvsmiBYzteRF64mkT0S92gMhv2UErQW12/T8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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