Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '698f76b7b5975f4fd17be478a2fc4dfb6cb9fba440d0c870c1fcd9944d4fc75a' 
  AND token = 'CMeo8vjNWc9lA6SJt4hL9X3giwP6xk+TeIyFUexZgSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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