Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '045e23d2c993da8716e6cfd52cbcca234b0ba51f1d6a3d0379c3f61ba708d699' 
  AND token = 'mjn3GFbPGhS1bMPIVk0Tow30vGLSi94oLOiec/mfyjc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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