Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '776996a8bc12058e2b083920b4ab588be19730801e40deaac05b45e32980c759' 
  AND token = 'bsPrIxvpsIzFlHr3HTRUAKCCetZgY31r1F9PAW9Dliw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}