Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4821607829b5268729ee87a3b4f61f5662a6cedcad38811422161edfccde391d' 
  AND token = 'aG2Z5qMNfxEb1+KAFfJunl1xuAOek6WhIgRADaf63TA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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