Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84d205945aac49b922bfc7059d385b19fe7e0e69d7411ff7412a902f8c8b9d97' 
  AND token = 'QZzGrN0jJUWX+1MGMRYgy6TSdieBDxkx0ptMer/sTWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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