Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d99b726868e840a0ba89995b539a2f66a9a3db9fa65888eeb287c0ba3c4e4f4' 
  AND token = 'kE0ZSvojZQjSsVm5mszRhpPoXTKuA5lE2CgZAvAbq0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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