Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae8d71a3d2e5050b6cef1a2f1b225ff7bdd81672385980a9e63cbc72bc889179' 
  AND token = '+b7kJKwm5eexELeLeeMlmSisvOikgJhy4p0ssrpgn5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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