Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3ef2e432296142654998637e14e547ab7e6aa7dcfec64092c005b8952cafd97' 
  AND token = 'n+PDV9ayLY4XGfvbgD3oTAj35zvUPQx8SMoyOL4tQ48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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