Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cadbd44531e4da31cb72d49c8aaa80f1fbee81287367344cfdcfdc31d137df73' 
  AND token = 'Qp23i03v7ojBPpwHD6sTWxjk5Bmbmvzb9t8K0QFgmus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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