Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cdbda040b9fe382aa94b41bedaf604ebd87bb9caff508b02b68801ef5794a13' 
  AND token = 'vasWX8LZHjQg4XCN0X1CCvMUp1StkH8AL85KFS4xhdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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