Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'a1d7124f882eda1742858db11b9935bd7b489e765159d3c977ded4da3d689f1c' 
  AND token = '4SS9/YYMwafqxc0TuD+zm9cPVJVb7P8nfnz1S68SO2k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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