Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '066a36be0a4281214da8dfae0715fd65ca9a44b304a0c3923e5abd3e2c318809' 
  AND token = 'QrpHV9Qza/TW81jHC957P3rkxbLkqzNWuzbRKmKf3+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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