Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5e688b8cb94ac81405717d9639bd91d74ab406366a1d3b0f729a7081acd5cc37' 
  AND token = 'zdbm1/llFiMEnfyrxUkgiFkkhai8UyMmEFA+4cJbiLk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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