Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5eadedf55820077ecfc1a0455a9281d36b2ffd6ef777abf524a90a2fac456697' 
  AND token = 'O9TuLyog/rNWqOigafrkLg55NiSlVmgrVBLfA1wbJhg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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