Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '84713e7aa1cc482791f91149dea4d04c3f1b22cda4bd3ac7fa24ca337c92902f' 
  AND token = 'BbEA4U4o3xh+9/pnDL+c2QaB/Y4MM5i65vZGQMJC10g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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