Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5739e3bfc9d9eb86771195a916a5e7936cb2a9139c53c36730d9837971307552' 
  AND token = 'NsUyyoEyqqqvI8mYVQFHHJ6s3agidURA2eT74qPp/H4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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