Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bb844f466973f326539ab6c289a1701ce3000dc688e33cd8dd916432ab6a5a1' 
  AND token = 'pDLO55N/Rxmf7aPGBYpD7sW5CGVJSpPAz3HtDtJOAxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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