Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49ad54cba4ca6270e9a45d9bf9213d9102285e8e9c5241ac9694cbf86072d7f3' 
  AND token = 'FX/6TfTx6y+pK3bCENdApSTqEPPcvcoMS+wv4k6JVIQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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