Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c059a3b4ba16232f44abeadfdbbd884d1d4fa5b5bf57c1ce2d9e9f86d4e8be9a' 
  AND token = 'u21FriqnzBPU0QHtFMoYTjBr6/QydRLD0r41bau/pLs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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