Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '861f45ea76c7e341d19fcddedc019353ed4722dbdb05c8f2eeee04f30167c96c' 
  AND token = 's2cpP+wanCriREAfgLF1zKzmngrenszYuUdCKX7qcRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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