Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4316b0a3a23a8ab37bad3a7d7d7a33a51b4161d18ab32cc49b45f6f4df164fa' 
  AND token = 'y5SaFU1NFyG0g3d2HAW+sZ5VzYnnLCere/PmdUa/tpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}