Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '682abed38386f0fa469b2e07b52485d7fc383d4e878df940cae32c667c269738' 
  AND token = 'UYWTvXR0sGDr3VS/1u2fdWNXsVBmOKV7d2lXvsKefq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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