Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '318f885e4c7a2fa126a65bc924e0b8e44a3a0aec49fb875384a2774e7995e287' 
  AND token = 'nws0ZE5Ql+fVMH0+kFNXh604pvmcU5T2B0dqVu2S4dg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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