Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5943378ae4f742e433434167532a1088354398a9f967769ce78367f5a2ce23b0' 
  AND token = 'rIxpEXZWH5BNHrNswADpP+GafeU0EpvCoXealkakfBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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