Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '223110ddaa1464f6f0f7f090d4c3d9185cf26a5846bf292a23a34b94512f4987' 
  AND token = 'LWWSgsb4tI64uyKsxJZ4lWgBSLJUEMB/A8E1z7tS354=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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