Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02fbebe79e3847cde9790ab7190d9ac017271706d7179d15a29ee8b4b00b72a0' 
  AND token = 'O04b8kg2m02t/LKP4pwvtkBPzhlu+pZYdgnMV684oAM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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